All are correct.
Note, though the following corrections:
1. used to (not use to)
3. their opinions
I need to double check my work please.
Revise to create pronoun-antecedent agreement and eliminate the generic he and any awkward pronoun reference.
1) While shopping for a new computer for school, I noticed that a laptop costs much less then they use to.
A) While shopping for a new computer for school, I noticed that a laptop costs much less then it use to.
2) Congress usually resists a president’s attempt to encroach on what they consider their authority.
A) Congress usually resists a president’s attempt to encroach on what is considered their authority.
3) Macro and Ellen were each given a chance to voice their opinion.
A) Macro and Ellen were given a chance to voice their opinion.
4) An emergency room doctor needs to be swift and decisive; he also needs to be calm and careful.
A) An emergency room doctor needs to be swift and decisive; while also being calm and careful.
5) Every dog and cat has their own personality.
A) Dogs and cats have their own personality.
2 answers
And in 1, it's "than" not "then."
1 answer